Transcript DCN MCCU Equalizing a System

Security Systems BU Communication Systems
Equalizing a Multi CCU System
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09.12.2004
System set up procedure equalizing a system
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I&O Manual
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Security Systems BU Communication Systems
Equalizing a Multi CCU System
Equaliser function
To produce optimum speech intelligibility for a particular discussion room or conference hall the CCU
includes a built- in system audio equalisation facility. This facility automatically sets the overall audio
characteristics of the DCN unit loudspeakers.
NOTE: All CCU’s must be equalised individual. Channel 12 equalized PA and channel 13
(delegate/ loudspeakers) only will be equalized.
To Equalise the system proceed as follows:
NOTE: Before carrying out the equalisation process, it is recommended that the surrounding
area be kept as quiet as possible. The number of microphones which can be selected
for the ‘auto- equalisation’ measurement process can be selected by the user.
Proceed as follows:
• Press the equalising recess switch(3) ‘Start’ located on the front of the CCU to enter the
microphone selection mode (refer to page 4- 1). Entry into this mode is indicated by an
illuminated busy LED.
• The chairmans microphone will automatically be selected for the auto equalisation procedure,
however, the user can select up to 8 microphones to gain better performance. To select
additional microphones simply press the ON/ OFF button of the relevant microphone. If a
chairman unit is not connected to the system, a delegates microphone will be switched on.
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Equalizing a Multi CCU System
• To activate the ‘auto- equalisation’ procedure press the equalising recess switch (3) ‘Start’
once again. A noise will be heard and the busy LED will begin to flash, indicating automatic
equalisation is being processed. After the measurements, the filter settings are calculated
(this may take a few minutes).
NOTES:
1. To abort the auto equalisation procedure press any button on the CCU. Aborting restores
the previous equalisation settings.
2. Selecting the auto- equalisation measurement process is only possible when in the
“Single CCU” mode .
3. The equaliser function can be used with or without DCN software running.
However, the ‘Auto’ equaliser facility will not function if the DCN software is running.
• loudspeaker used, particularly if a microphone is relative close to a loudspeaker.
Switching between a microphone- loudspeaker combination and another can result in an
entire different frequency response. Therefore, equalisation has primarily an advantage if the
microphone is in the diffuse field of the loudspeaker, for example if a separate PA system is
used.
- The equaliser is only active on the delegate loudspeaker channel and the equalised PA
output. The equalised PA output is only available on the Audio Media Interface
LBB3508/ 00, channel 12.
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Equalizing a Multi CCU System
End of section
 Robert Bosch GmbH
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